A college-level general or cell biology class with a lab is a basic course requirement for BSN programs. Nursing students need a basic understanding of cell structure, processes, growth and reproduction. Some BSN programs only require one semester in general biology, but most universities have their own science prerequisites, and you may need two semesters to enroll in advanced biology classes. Many BSN programs require general microbiology and nutrition, which are traditionally offered as high-level biology classes. If you want your application to stand out, enroll in advanced biology classes, even if they aren't required.
Anatomy and physiology are prerequisite classes for nursing programs. Universities often combine the subjects into one year-long course or offer each one as separate one-semester courses. Anatomy classes focus on the structure of the human body, while physiology classes explore different systems within the body, such as muscles, the nervous system and cardiovascular functions. It also covers skin and tissue, the endocrine system and body regulation basics, such as metabolism. Students will need to take lab classes, concurrent with the lecture classes.
Unlike pre-med courses, the academic requirements for nursing schools aren't limited to the sciences. Nursing programs typically look for candidates with a well-rounded background in a range of subjects. Many schools require English composition or expository writing, psychology, statistics and mathematics up to college-level algebra. You may also need a sociology credit and a few humanities classes. Check with any nursing programs that interest you to see their list of required courses.